Discuss what is meant by the mean-variance framework in the context of portfolio choice Consider a portfolio
Question:
Suppose that the correlation between the two expected returns is equal to zero. An investment manager has constructed a portfolio made up of 50% of stock X and 50% of stock Y. Another manager makes the following comment: "Since the expected returns and standard deviations of the two stocks are the same and their returns are not correlated, it does not make sense to combine A and B in a portfolio."
State whether you agree with this statement and provide a proof of your argument using the numbers in the table.
Suppose that the correlation between the two expected returns is equal to one. Would you agree in this case that combining these stocks in a portfolio does not bring any benefit in terms of risk reduction? Provide proof of your argument using the numbers in the table.
Microeconomics An Intuitive Approach with Calculus
ISBN: 978-0538453257
1st edition
Authors: Thomas Nechyba